In a finding that may one day help control a major cause of death among children in developing countries, a team of researchers led by faculty from the University of Maryland, College Park and the University of Maryland School of Medicine has identified microorganisms that may trigger diarrheal disease and others that may protect against it. These microbes were not widely linked to the condition previously.
"We were able to identify interactions between microbiota that were not previously observed, and we think that some of those interactions may actually help prevent the onset of severe diarrhea," says O. Colin Stine, a professor of epidemiology and public health at the University of Maryland School of Medicine.
Mihai Pop, an associate professor of computer science at the University of Maryland, recently concluded a major study of diarrheal pathogens in young children from low-income countries.
Credit: University of Maryland
A much better understanding of these interactions is important, Stine adds, as they could lead to possible dietary interventions. Moderate to severe diarrhea (MSD) is a major cause of childhood mortality in developing countries and ranks as one of the top four causes of death among young children in sub-Saharan Africa and South Asia.
Stine and Mihai Pop, an associate professor of computer science at the University of Maryland, College Park led the six-year project funded by $10.1 million from the Bill & Melinda Gates Foundation. The research results are available in a paper published today in the journal Genome Biology.
The researchers used a technique called high-throughput 16S rRNA genomic sequencing to examine both "good" and "bad" microbiota -- the tens of trillions of microbes that inhabit the human intestinal system -- in samples taken from 992 children in Bangladesh, The Gambia, Kenya and Mali under the age of 5 who were suffering from MSD.
The researchers identified statistically significant disease associations with several organisms already implicated in diarrheal disease, such as members of the Escherichia/Shigella genus and Campylobacter jejuni. They also found that organisms not widely believed to cause the disease, including Streptococcus and Granulicatella, correlated with the condition in their study. In addition, the study revealed that the Prevotella genus and Lactobacillus ruminis may play a protective role against diarrhea.
The project is an offshoot of a $20 million study commissioned by the Gates Foundation in 2006. The Global Enterics Multicenter Study (GEMS) was launched in response to unanswered questions surrounding the burden and etiology of childhood diarrhea in developing countries.
GEMS collected troves of useful data on MSD, yet there were still some uncertainties, says Pop, who also has an appointment in the University of Maryland Institute for Advanced Computer Studies.
For example, in almost 50 percent of the children examined with diarrhea, the condition could not be attributed to a specific causal pathogen. The GEMS research also found numerous children carrying Shigella, which is known to cause problems, yet the children showed no signs of MSD.
The Gates Foundation contacted the two University of Maryland scientists in 2007, looking for new analyses of the GEMS data via a combination of computational biology, epidemiology and public health.
"New technologies have opened up new windows of discovery, so they asked us to look at the samples," says Pop, who adds that he and Stine expect to conduct further genomic and epidemiological studies to assess the potential development of diet- or microbiological-based therapeutics.
The longstanding scientific collaboration between the two researchers is enhanced by the MPowering the State strategic partnership, launched in 2011 to support collaborative research and education between the state's top two public research institutions, the University of Maryland, College Park and the University of Maryland, Baltimore.
In addition to funding from the Bill & Melinda Gates Foundation, this study was also supported partly by the National Institutes of Health, the National Science Foundation and The Wellcome Trust.
About the University of Maryland, College Park
The University of Maryland is the state's flagship university and one of the nation's preeminent public research universities. A global leader in research, entrepreneurship and innovation, the university is home to more than 37,000 students, 9,000 faculty and staff, and 250 academic programs. Its faculty includes three Nobel laureates, two Pulitzer Prize winners, 49 members of the national academies and scores of Fulbright scholars. The institution has a $1.8 billion operating budget, secures $500 million annually in external research funding and recently completed a $1 billion fundraising campaign.
About the University of Maryland School of Medicine
Established in 1807, The School of Medicine is the first public and the fifth oldest medical school in the United States, and the first to institute a residency-training program. The School of Medicine was the founding school of the University of Maryland and today is an integral part of the 11-campus University System of Maryland. On the University of Maryland's Baltimore campus, the School of Medicine serves as the anchor for a large academic health center which aims to provide the best medical education, conduct the most innovative biomedical research and provide the best patient care and community service to Maryland and beyond. While its tradition of academic excellence remains constant, the School of Medicine is increasingly known as one of the largest and fastest-growing biomedical research institutions in the nation.
Tom Ventsias | Eurek Alert!
Newly designed molecule binds nitrogen
23.02.2018 | Julius-Maximilians-Universität Würzburg
Atomic Design by Water
23.02.2018 | Max-Planck-Institut für Eisenforschung GmbH
A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.
In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...
A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.
By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
23.02.2018 | Physics and Astronomy
23.02.2018 | Health and Medicine
23.02.2018 | Physics and Astronomy